Gyrating screen



Jan. 26, 11937. G. w. BEHNKE GYRATING CREEN Filed Sept. 28, 1955 2 Sheets-Sheet l ATTORNEY.

.Han. 26, 1937. e. w. BEHNKE GYRATING SCREEN Filed Sept. 28, 1935 2 Sheets-Sheet 2 INVENTOR.

Patented Jan. 26 1937 UNI-TED STATES PATENT OFFICE Simplicity Engineering Company,

Durand,

Mich, a corporation of Michigan "Application September 28, 1935, Serial No. 42,688

6 Claims.

This invention relates to gyrating screens such as used to screen gravel, coal, and other fragmentary material of either a wet or dry classification, and more specifically to the drive shaft assembly mounting.

One of the prime objects of the invention is to provide means for permitting a, limited longitudinal movement of the gyrating shafts or units with relation to each other and to the supporting base or the support on which it is mounted to compensate for variations caused by misalignment, expansion, and/or contraction occasioned by handling hot materials and/ or for any other cause.

Another object is to provide simple and practical automatically adjustable means for permitting a limited longitudinal movement of one of the shaft mountings Without in any manner affecting the drive or the mechanism in general.

This present invention is particularly advantageous where longitudinally spaced apart gyrating units or shaft assemblies must be synchronized so that the screen and frame is positively actuated as a unit, in order to secure the best results. The present design is extremely efficient in that it permits of easy and quick adjustment and synchronization, it insures against binding and twisting and readily accommodates itself to changes in operating conditions influenced by the product being handled.

With the above and other objects in view, the present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportion, and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

In the drawings- Fig. l is a side elevation of a gyrating screen showing my improved mounting.

Fig. 2 is a top plan view.

Fig. 3 is an enlarged fragmentary side view.

Fig. 4 is an enlarged fragmentary end view.

Fig. 5 is a fragmentary plan of one of the side beam members.

In the illustration shown in the accompanying drawings I have shown a supporting base or framework comprising the spaced apart beams 6 placed at a predetermined angle to give the necessary pitch. Grating shaft assemblies 1 and 8 span the beams and are mounted in end bearings 9 and ID as usual. Housings H and I2 are secured to and form an extension of said bearings, the shafts extending into said hous ings, and bevel gears I3 and I 4 respectively are mounted on said shafts and are driven in a manner to be hereinafter described.

A screen frame I5 is mounted on these gyrating units and includes side plates 16, and dustproof housings ll rigidly connect the side walls of the frame, a screen l8 being mounted therein in any approved manner, and. while in the present instance I have shown but a single screen, it will be obvious that it may be a single, double, or triple deck screen if so desired.

A sub-base i5 is provided beneath each of the bearings 9 and I0, each sub-base being formed as clearly shown in Figs. 3 and 4 of the drawings, the bearings 9 and It) being rigidly secured to their respective sub-bases by means of bolts 20. One pair of these sub-bases is mounted for movement on the frame and is grooved as at 2| to accommodate a key 22 which is welded or otherwise secured to the beams 6, longitudinally disposed slotted openings 23 being provided in the beams in spaced apart relation and accommodate bolts 24 which project therethrough, bars 25 being provided on the lower ends of the bolts, and springs 26 are interposed between said bar and a similar beveled bar 21, one edge of which is shaped to fit the angled flange of the beam 6, and it will be obvious that when the nuts 28 are turned down on the bolts 24, that the springs 26 will be compressed so that the subbase will automatically move in a longitudinal direction to automatically adjust when the moving force or pressure overcomes the frictional resistance. It will, of course, be obvious that lugs may be cast directly on the sub-base and engage in slotted openings in the beams, and that this may be accomplished in various other ways; I find, however, that the key and groove give complete satisfaction.

The gear housings H and I2 can be of any desired shape and design, the end walls 29 being provided with bearings 30 in which a longitudinally disposed shaft 3! is journaled, said shaft being formed in sections, the inner ends being mounted in the coupling and are slidable endwise therein to accommodate the movement of the gyrating shaft assembly, said coupling being mounted in the self-aligning bearing 33 which is bolted to the brackets 34 and which is in turn secured to the side of the frame.

The outer ends of the shaft sections are journaled in the bearings 30, and bevel gears 35 and 36 respectively are mounted thereon, said gears meshing with and driving the gears l3 and I4 in the usual manner.

The sectional shaft 3! is preferably mounted in sleeves 31, the ends of the sleeves projecting into the coupling and gear housings respectively to eliminate dust and dirt and further eliminate danger of clothing being caught, which may result in accident or injury to the workmen.

Oneend of the shaft 3| projects beyond the gear housing II, and any suitable driving mechanism (not shown) may be connected thereto, such as an electric motor or a pulley or sprocket for gearing the other convenient sources of power.

From the foregoing description it will be clearly obvious that I have perfected a very simple, practical, and unique automatically adjustable bearing for screening devices and the like.

What I claim is:

1. In a mechanism of the character described and including a frame longitudinally spaced apart shaft assemblies mounted thereon, bearings in which the ends of the shaft are journaled, one set of bearings having frictional engagement with the frame, longitudinally disposed driving means geared to and driving both shaft assemblies, said bearings being longitudinally adjustable on the frame when the end thrust from the driving means overcomes the frictional contact with the frame.

2. In a mechanism of the character described and including a frame, spaced apart transversely disposed shafts, bearings mounted on the frame and in which the ends of the shafts are journaled, one set of bearings having sliding frictional engagement with said frame, a longitudinally disposed drive shaft geared to and driving each of said shafts, said bearings being automatically and longitudinally adjustable with relation to the other when the end thrust of the driving mechanism overcomes the frictional engagement with the frame.

3. In a mechanism of the class described and including a supporting frame, bearings mounted thereon in spaced apart relation, one set of bearings frictionally engaging said frame and having a limited longitudinal movement thereon, transversely disposed shafts journaled in said bearings, and a longitudinally disposed drive shaft positively geared to and driving each of said longitudinally disposed shafts, said bearings being automatically adjustable on the frame when the end thrust of the drive shaft overcomes the frictional contact with the frame.

4. In a mechanism of the class described and including a frame, pairs of bearings mounted thereon in spaced apart relation, one pair of bearings having frictional engagement with the frame and being capable of a limited longitudinal movement with relation to the opposite pair of bearings transversely disposed shaft assemblies journaled in said bearings, a longitudinally disposed drive shaft geared to and simultaneously driving each of said shaft assemblies, said bearings being automatically adjustable when the endwise movement of the drive shaft overcomes the frictional contact with the frame.

5. In a mechanism of the class described and including a main frame, longitudinally spaced bearings mounted thereon in pairs, one pair having frictional engagement with the frame, and being mounted to permit a limited longitudinal movement with relation thereto, guides for preventing transverse movement of the bearings on said frame, transversely disposed shafts journaled in said bearings, and a common driving means geared to and driving each of said shafts.

6. In a screening apparatus having a main frame, bearings mounted thereon in pairs, shaft assemblies mounted in said bearings, a drive tional engagement with the frame.

GEORGE W. BEHNKE. 

